Questions tagged [number-sequence]
A puzzle in which the hidden pattern behind a given sequence of numbers (and, often, the next term) is to be found. Use with [sequence]
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Given the length of sequences with different seed values, what comes next? 1, 2, 4, 5, 11, 22, etc
Edit: Apparently this site has had a few too many what comes next puzzles without anything to go off of so I've decided to make this a different albeit a bit easier puzzle.
Sequences generated by a ...
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Self-numbers and repunits
Self-numbers or Colombian numbers (A003052 in the OEIS) are natural numbers which are not the sum of a smaller number and the sum of its digits. Repunits (in base 10) are numbers consisting only of 1'...
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What is a One-In-A-Million Number™?
This is in the spirit of the What is a Word™/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.
If a number conforms to a special rule, I call it a One-In-A-Million ...
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How is the RHS related to the LHS
Please explain the following relationship:
Accessible:
2 --> 18
20 --> 48
200 --> 6
2000 --> 26
How did I arrive at these?
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An interesting Number sequence: 8, 10, 7, ...? [closed]
Let's see how many of you can solve this correctly
I found a number sequence puzzle somewhere in the web with interesting logic and a unique strict solution.
8, 10, 7, 12, 5, 16, 3, ?
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Continue the row of numbers: 1, 3, 9, 13, 65, ...?
Yesterday, I stumbled across a series of numbers that I could not solve. Maybe one of you can figure it out?
1, 3, 9, 13, 65, …?
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Find the next number in these series..?
1, 1, 1, 1, 2, 2, 2, 2, 2, 5, 4, ?
2, 4, 6, 10, 15, 26, ?
71, 194, 38, 1701, 89, 76, ?
5303944, 6677714, 2070936216988528558, ?
1, 2, 3, 6, 9, 9, 16, 20, 18, 30, ?
You know, there is more than ...
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1, 2, 3, 10, ... Another find-the-next-number-in-the-sequence puzzle
Can you spot the pattern and continue the following sequence?
1, 2, 3, 10, 12, 16, 25, 37, 55, 81, 100, ...
Hints:
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What is the next number in the sequence below [closed]
6.000,7.000,.857,8.168,.105,77.790
Which of the following responses completes the series
.001
740.857
9.524
.013
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Two number patterns (clue: or geometrical shapes)
Solve the series:
Series 1:
6 and 1
5 and 2
4 and 3
5 and 1
???
Series 2:
6 and 1
5 and 2
5 and 1
4 and 3
???
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The "Slightly Spooky Sequence" Game
Two players, Alice and Beatrice, having previously agreed on a positive integer N (say 30) as a limit, take turns to write a sequence of positive integers. In the first turn Alice writes 1. Thereafter,...
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Introducing S-sequences: which is the shortest to contain all integers 1 to 20?
Consider a sequence (finite or infinite) of different positive integers, such as the following, in which the first term is 1, and thereafter the nth term is either the previous term plus n, minus n, ...
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Same sequence interwoven with itself creating groups
If we take all the digits from 1 to 9 and lay them out in order.
123456789
Now repeat the sequence and add it to the end.
123456789123456789
Now let's copy and reverse everything to create a second ...
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What is the last integer in this sequence?
Here are the first several entries in a finite sequence of integers.
$$ 31, 45, 71, 89, 91, 94, 111, 112, 118, 121, 126, 131, $$
$$ 134, 135, 139, 143, 144, 145, 148, 158, 161, 189, 193, 194, \dots $$
...
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How Many Magic Hexagons that use repeated digits?
There exists only 1 normal magic hexagon that uses non repeating consecutive digits for 1 to 19.
If We allow digits to repeat we can create something like this hexagon that is made up using ...
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What comes next in the sequence? (Counting sheep)
My roommate has insomnia so he was counting sheep to help him sleep.
He started with 2986, then continued with 47786, 764586, and 12233386.
What sequence is he following, and what was the next number?
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More bits the merrier
The computer department at Puzzled State University devised an inefficient
bit-based
(zeros and ones) number system, n',
for their ever more bit-happy machines.
...
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please Extend this list of Units
Given the following list of four corresponding series of numbers, what would the fifth line look like?
1 : 1.4 / 3
2 : 3 / 2 | 1 : 2 / 6
2 : 3 / 2
1 : 2 / 3
Hint 1: This puzzle was inspired by the ...
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Square Sum Problem Summing 3 consecutive digits along the line
In this image from a numberphile video we see a sequence of numbers from 1 to 15 without repeats where any pair of neighbouring digits sum together to make a perfect square number.
15 is the lowest ...
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Saturdays' Sequences
0.469281 0.267974 0.333333 0.333333 0.666667 0.499346 0.333333
2 2 1 1 2 2 1
3 2 F 0 0 0 0
U P F O X F E
0 0 1 1 2 1 1
Here are 5 intertwined sequences. I will add one sequence each saturday ...
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Smallest 3x3 Magic Square of different square sums
Consider the follow magic square highlighted in yellow. The sum of its rows and columns are in green and the sum of the diagonals in red.
All of its sums are a square number with the sum of the whole ...
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What's the next number? You may need some help
What's the next number in the following sequence?
1, 3, 6, 7, 9, 11, 13, 14, 18, 21, 23, 28, 31, ___, ...
Hints will be released gradually - the first one is in the title.
Hint #2:
Additionally:
...
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Twelve numbers omitted
This is the beginning of a simple sequence.
NO Computers or special knowledge are required.
Insert the missing numbers. Explain how the sequence was generated.
Note: the line breaks can be ignored, ...
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Look at me - a number sequence
This sequence goes on forever, but here are the first 7 terms. The X's are just there to hide the actual digits. Can you find all the correct digits of the 8th entry?
1024, 90X1X, 25023X, 490364, ...
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This number sequence has entered my life recently
Just recently, I've noticed this sequence of numbers has become a pretty big part of my life. It goes like this:
1, 2, 4, 6, 9, 12
So here's the mystery:
What is this sequence?
Where do I keep seeing ...
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A rather odd number sequence!
Can you find the next number in this baffling sequence?
925, 955, 1040, 1140, 1255, 225, 410, ?
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The Very Model of a Number Sequence
Number sequence questions are normally not received well here but I thought this one might warrant a bit more attention as it has the following interesting properties:
It is a finite sequence.
Each ...
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Odd one's out (sequence)
Once upon a time, there was a curious mathematician named Friedrich. One day, while exploring a new area of mathematics, he stumbled upon an intriguing sequence of numbers:
0, 1, 2, 2, 4, 3, 3, 4, 4, ...
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A Weird Sequence
Today, I was in Rome for a vacation. The most peculiar thing happened. A gnome walked up to me. Uttering no words, it handed me a slip of paper.
0, 1, 1, 2, 3, 2, 5, 5, 5, 9, 4, ?
Naturally, I was ...
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Number sequence: 5, 12, 24, 36, 52, 68, 84, 100, ? What's next?
Replace the question mark and explain the rule behind this sequence:
5, 12, 24, 36, 52, 68, 84, 100, ?
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Missing number in a sequence: 61, 52, 63, 94, ??, 18, 001, 121
I am trying some quantitative aptitude questions and I am unable to solve this particular multiple-choice finish-the-sequence question:
Find the missing number in the sequence: 61, 52, 63, 94, __, 18,...
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Another predictable sequence: 1, 1, 2, 2, 1, 17, etc
This puzzle is part of the Monthly Topic Challenge #6: Is it really that [time] again?.
Can you find the pattern? Note: The next number hasn't been worked out yet.
...
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What are the missing numbers in the circle?
Given the following diagram, what are the missing two numbers in the last figure?
This is from a mathematics book for primary school
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Is this series limited to six numbers only?
Maybe this problem is already answered. I am not aware.
What is the next number in the following series?
Importantly, after that number, are there any more numbers? Is there a math-related reason for ...
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My dead mom left behind some number code
Background: I actually do not know the answer to this puzzle, but can answer any questions you may have. My mom who is now deceased had this series of numbers written in her notebook, that don't seem ...
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Will the sequence ever change?
Here is a sequence that seems to go on forever. Will it? Will this sequence ever change?
1,2,3,1,0,1,2,3,1,0,1,2,3,1,0 and so on
What does this sequence relate to?
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Number sequence puzzle stuck on
Stuck on this number sequence puzzle for a while now, today was talking about IQ tests with somebody so thought I'd ask here.
1, 2, 33, ?, 555, 23, ?, 222
The source is INRC 2018 Q3 (btw if anyone ...
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Chinese Pinyin Puzzle
Puzzle World in VR Chat. Must Select the 8 Words in the right order 1-8. Nothing other than that I'm aware of.
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What is the next number in this sequence? (My first)
This is my first attempt at a question. Please let me know what you think of it, I came up with the idea for it while trying to figure out some of the other sequence questions here.
1, 2, 5, 10, 21,...
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What is the next number in the series 1111111,111,21,13,12,11,10? [closed]
Find the next number in the series 1111111,111,21,13,12,11,10,
[There was a hint saying the answer is a single-digit integer, and the series has something to do with the number 7]
I've only been able ...
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Two naughty programmers
The math professor wrote an equation f(x) = x and defined t as number of solutions at f(x) = 5 and u as number of solutions at f(x) = 3. He further defines N as N = t+u
Two programmers decided to edit ...
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An increasing decreasing sequence
In math, there are all kinds of sequences
1545, 1218, 1071, 921, 851, 832, 799, 793, 774, 745, ... is (the start of) such as sequence
What is the best number?
Note:
Even in math things change, so ...
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Balanced binary cycle
Let's call a binary cycle ${\bf x}:x_1,x_2,\ldots, x_{12}$ balanced if exactly 6 of the $x_i$'s are 0 and 6 of them are 1. We can place the sequence around a circle and add each two adjacent digits ...
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German number sequence
Classical format, here is a sequence of numbers, you need to find out how it continues:
5, 4, 14, 8, 0, 4, 2, 2, 2, 0, -3, -1, -2, -3, -7, -7, -6
This puzzle should also have the tag 'Germany' ...
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What is the sequence?
The following 5 sequences of base-10 numbers all follow the same pattern, and converge at 14,.
What is the pattern and which number is next?
1,5,10,14,23,...
2,6,10,14,23,...
3,9,14,23,...
4,9,14,23,.....
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Mom Got Me Shoes For My Birthday
What number must replace the question mark below?
218
19
780
17
11
9,000
301
6
8
600
?
80
70
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Next number in the sequence 2, 4, 3, 10, 5, 5, 28, 11
2, 4, 3, 10, 5, 5, 28, 11, 7, 8, 82, 29, ?
I was asked this on an interview. My time ran out and I couldn't figure out the pattern. I am spotting a lot of $3^n + 1$ terms here maybe that is helpful ...
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20 cards facing down
You have a row of $20$ cards facing down.
A 'move' consists of the following actions performed in sequence:
Pick a face-down card and flip it face-up
If there is one, also flip the next card on ...
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Radical IQ challenge
This puzzle is part of the Monthly Topic Challenge #2: IQ Puzzle Parody
Can you find out the next one in the sequence, how it's different to the ones before it, and explain the pattern?
1
10
11
20
31
...
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There are a lot of gifts missing
1-108-121-128-146-157-195-227-305-315-???
There are a lot of gifts missing
There is a missing 11th number which is it?
This is not on OEIS :)
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